Programming instructions

Glossary
LabVIEW Data Acquisition Basics Manual G-12
© National Instruments Corporation
R
read mark Points to the scan at which a read operation begins. Analogous to a file
I/O pointer, the read mark moves every time you read data from an input
buffer. After the read is finished, the read mark points to the next unread
scan. Because multiple buffers are possible, you need both the buffer
number and the scan number to express the position of the read mark.
read mode Indicates one of the four reference marks within an input buffer that
provides the reference point for the read. This reference can be the read
mark, the beginning of the buffer, the most recently acquired data, or the
trigger position.
referenced signal sources Signal sources with voltage signals that are referenced to a system ground,
such as the earth or a building ground.
Also called
grounded signal sources.
referenced single-ended
(RSE) measurement
system
All measurements are made with respect to a common reference or a
ground.
Also called
a grounded measurement system.
RMS Root Mean Square.
row-major order A way to organize the data in a 2D array by rows.
RSE Referenced Single-Ended.
RTD Resistance Temperature Detector. A temperature-sensing device whose
resistance increases with increases in temperature.
RTSI Real-Time System Integration bus. The National Instruments timing bus
that interconnects data acquisition boards directly, by means of connectors
on top of the boards, for precise synchronization of functions.
run_me.llb
A LabVIEW DAQ VI library containing VIs that perform basic operations
concerning analog I/O, digital I/O, and counters.
S
sample A single (one and only one) analog or digital input or output data point.
sample counter The clock that counts the output of the channel clock, in other words, the
number of samples taken. On boards with simultaneous sampling, this
counter counts the output of the scan clock and hence the number of scans.